Siemens SIPROTEC 7UT613 series Manual page 443

Operating Times of the Definite Time Stages
Dropout to Pickup Ratios
Inrush Restraint
Frequency
7UT613/63x Manual
C53000-G1176-C160-2
4.4 Time Overcurrent Protection for Phase and Residual Currents
times
Tolerances with definite time (ANSI)
times
The set times are pure delay times.
Secondary values for I
1)
N
With one 3-phase measuring location and I/I
2)
Pickup time / dropout time phase current stages
Pickup time at frequency
without inrush restraint, min.
with inrush restraint, min.
Dropout time, approx.
Pickup time / dropout time residual current stages
Pickup time at frequency
without inrush restraint, min.
with inrush restraint, min.
Dropout time, approx.
1
) for high-speed relays – 4.5 ms
Current stages
Inrush restraint ratio
(2nd harmonic) I
/I
2fN fN
Lower operation limit
Max. current for restraint
Cross-block function between phases
max. action time for cross-block
Secondary values for I
1)
N
Frequency influence
5 % ± 15 ms
5 % ± 45 ms
for 2 ≤ I/I
and T
or 2 ≤ I/3I
and T
2)
5 % ± 15 ms
5 % ± 45 ms
for 2 ≤ I/I
for 2 ≤ I/I
and D
and D
= 1 A; for I
= 5 A the currents must be multiplied by 5.
N
= 1 A/5 A
N
50 Hz
11 ms
33 ms
35 ms
50 Hz
1
) 21 ms
1
) 31 ms
45 ms
10 % to 45 %
I > 0.2 A
0.30 A to 25.00 A
can be activated / deacti-
vated
0.00 s to 180.00 s
= 1 A; for I
= 5 A the currents must be multiplied by 5.
N
within the frequency tagging range
at f = 50/60 Hz
N
at f = 16.7 Hz
N
≤ 20
P
/s ≥ 1;
IP
≤ 20
0P
/s ≥ 1
3I0P
at f = 50/60 Hz
N
= 16.7 Hz
for f
N
≤ 20
P
≤ 20
P
/s ≥ 1;
IP
/s ≥ 1
3I0P
60 Hz 16.7 Hz
11 ms 16 ms
29 ms 76 ms
35 ms 60 ms
60 Hz 16.7 Hz
19 ms 46 ms
29 ms 56 ms
43 ms 90 ms
approx. 0.95 for I/I
Steps 1 %
1)
1)
Steps 0.01 A
Steps 0.01 s
≥ 0.5
N
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